/* ==========================================================================
   AURA — INTELLIGENCE STUDIO
   theme.css — 单文件三主题：studio(默认 硅谷) / ink(墨夜) / paper(纸面)
   同一语义结构，靠 [data-theme=…] 整面重排 —— 三种排版，不是三种配色。
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, "Segoe UI", system-ui,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  transition: background-color .5s ease, color .5s ease;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* custom scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 8px; border: 2px solid var(--bg); }

/* ---------- 2. 主题 Token ---------- */
:root, [data-theme="studio"] {
  /* 标准硅谷 */
  --bg: #ffffff;
  --bg-2: #f6f7f9;
  --bg-3: #eef0f4;
  --ink: #0a0b10;
  --ink-2: #52555f;
  --ink-3: #9aa0ab;
  --line: rgba(10, 11, 16, .09);
  --line-strong: rgba(10, 11, 16, .18);
  --accent: #5b67ff;
  --accent-2: #8b9bff;
  --accent-ink: #ffffff;
  --card: #ffffff;
  --card-line: rgba(10, 11, 16, .08);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 12px 32px rgba(16, 24, 40, .08);
  --shadow-lg: 0 24px 64px rgba(16, 24, 40, .14);
  --radius: 14px;
  --radius-lg: 22px;
  --glow: none;
  --glass: none;
  --grain: none;
  --font-display: -apple-system, BlinkMacSystemFont, Inter, "SF Pro Display", system-ui,
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --track-label: .14em;
}

[data-theme="ink"] {
  /* 墨夜工具台 */
  --bg: #05060a;
  --bg-2: #090a11;
  --bg-3: #0e1019;
  --ink: #f2f3f8;
  --ink-2: #a6a9b8;
  --ink-3: #5c5f6e;
  --line: rgba(255, 255, 255, .08);
  --line-strong: rgba(255, 255, 255, .16);
  --accent: #8b9bff;
  --accent-2: #c9cfff;
  --accent-ink: #05060a;
  --card: rgba(255, 255, 255, .03);
  --card-line: rgba(255, 255, 255, .09);
  --shadow-sm: 0 0 0 1px rgba(255, 255, 255, .05), 0 8px 24px rgba(0, 0, 0, .4);
  --shadow: 0 0 0 1px rgba(255, 255, 255, .06), 0 20px 60px rgba(0, 0, 0, .55);
  --shadow-lg: 0 0 0 1px rgba(255, 255, 255, .08), 0 40px 120px rgba(0, 0, 0, .7);
  --radius: 18px;
  --radius-lg: 26px;
  --glow: 0 0 40px rgba(139, 155, 255, .28), 0 0 120px rgba(139, 155, 255, .14);
  --glass: saturate(160%) blur(20px);
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
}

[data-theme="paper"] {
  /* 瑞士 / 纸面杂志 */
  --bg: #f5f3ec;
  --bg-2: #eeebe2;
  --bg-3: #e7e3d8;
  --ink: #191710;
  --ink-2: #4a473d;
  --ink-3: #8b877a;
  --line: rgba(25, 23, 16, .22);
  --line-strong: rgba(25, 23, 16, .45);
  --accent: #c43e2a;
  --accent-2: #c43e2a;
  --accent-ink: #f5f3ec;
  --card: #f5f3ec;
  --card-line: rgba(25, 23, 16, .22);
  --shadow-sm: none;
  --shadow: none;
  --shadow-lg: none;
  --radius: 0;
  --radius-lg: 0;
  --glow: none;
  --glass: none;
  --grain: none;
  --font-display: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
}

/* ---------- 3. 版式 ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.08; letter-spacing: -0.02em; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--ink-2); }

[data-theme="paper"] h1, [data-theme="paper"] h2, [data-theme="paper"] h3 { font-weight: 500; letter-spacing: 0; }

/* ---------- 4. 布局原语 ---------- */
.container { width: min(1180px, 92vw); margin-inline: auto; }
.section { padding-block: clamp(72px, 10vw, 132px); position: relative; }

/* ---------- 5. 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 48px);
  transition: background .4s ease, box-shadow .4s ease, border-color .4s ease, backdrop-filter .4s;
}
.nav.scrolled { border-bottom: 1px solid var(--line); }
[data-theme="studio"] .nav { background: transparent; }
[data-theme="studio"] .nav.scrolled { background: rgba(255, 255, 255, .82); backdrop-filter: blur(16px); }
[data-theme="ink"] .nav { background: transparent; }
[data-theme="ink"] .nav.scrolled { background: rgba(5, 6, 10, .6); backdrop-filter: blur(20px); border-bottom: 1px solid var(--line); }
[data-theme="paper"] .nav { background: var(--bg); border-bottom: 1px solid var(--line); }
[data-theme="paper"] .nav.scrolled { background: var(--bg); }

.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 700; }
.brand svg { height: 22px; width: auto; }
.brand__bar { transition: width .4s ease; }

.nav__links { display: flex; align-items: center; gap: clamp(18px, 3vw, 36px); }
.nav__links a {
  font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  position: relative; padding: 4px 0;
  transition: color .25s;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a.active { color: var(--ink); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--accent); transition: width .3s ease;
}
.nav__links a:hover::after, .nav__links a.active::after { width: 100%; }
[data-theme="paper"] .nav__links a { font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }
[data-theme="paper"] .nav__links a::after { height: 1px; }

.nav__actions { display: flex; align-items: center; gap: 12px; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-weight: 600; font-size: 15px; line-height: 1;
  padding: 14px 26px; border-radius: 999px; white-space: nowrap;
  transition: transform .25s, box-shadow .25s, background .25s, color .25s, border-color .25s;
  will-change: transform;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow-sm); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--ghost { color: var(--ink); border: 1px solid var(--line-strong); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn--lg { padding: 17px 32px; font-size: 16px; }
.btn .arr { transition: transform .3s ease; }
.btn:hover .arr { transform: translateX(4px); }
[data-theme="paper"] .btn { border-radius: 0; font-family: var(--font-mono); letter-spacing: .04em; font-weight: 500; }
[data-theme="paper"] .btn--primary { box-shadow: none; }
[data-theme="ink"] .btn--primary { box-shadow: 0 8px 30px rgba(139, 155, 255, .3); }

/* ---------- 7. Hero（三主题三种排版） ---------- */
.hero { position: relative; padding-top: clamp(120px, 16vh, 190px); padding-bottom: clamp(48px, 7vw, 96px); overflow: hidden; }
.hero__inner { position: relative; z-index: 2; }
.hero__eyebrow { margin-bottom: 28px; }
.hero__title {
  font-size: clamp(2.6rem, 7.5vw, 5.8rem);
  letter-spacing: -0.03em; max-width: 14ch;
}
.hero__title .grad { background: linear-gradient(120deg, var(--ink) 30%, var(--accent) 70%, var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__sub { margin-top: 26px; max-width: 56ch; }
.hero__actions { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero__meta { margin-top: 56px; display: flex; gap: 28px; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-3); }
.hero__meta b { color: var(--ink); font-weight: 600; }

/* --- studio: 居中 --- */
[data-theme="studio"] .hero { text-align: center; }
[data-theme="studio"] .hero__inner { display: flex; flex-direction: column; align-items: center; }
[data-theme="studio"] .hero__title { max-width: 16ch; }
[data-theme="studio"] .hero__sub { margin-inline: auto; }
[data-theme="studio"] .hero__meta { justify-content: center; }

/* --- ink: 左对齐全出血 + 右浮动玻璃卡 --- */
[data-theme="ink"] .hero { text-align: left; }
[data-theme="ink"] .hero::before, [data-theme="ink"] .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none;
}
[data-theme="ink"] .hero::before { width: 560px; height: 560px; top: -120px; right: -80px; background: radial-gradient(circle, rgba(139,155,255,.5), transparent 70%); }
[data-theme="ink"] .hero::after { width: 420px; height: 420px; bottom: -160px; left: -120px; background: radial-gradient(circle, rgba(139,155,255,.28), transparent 70%); }
[data-theme="ink"] .hero__title { font-size: clamp(2.8rem, 8vw, 6.4rem); }
[data-theme="ink"] .hero__title .grad { background: linear-gradient(120deg, #fff 20%, var(--accent) 60%, var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* --- paper: 编辑式报头 --- */
[data-theme="paper"] .hero { padding-bottom: 0; text-align: left; }
[data-theme="paper"] .hero__eyebrow { font-size: 13px; }
[data-theme="paper"] .hero__title { font-size: clamp(2.9rem, 9vw, 7.5rem); font-weight: 500; line-height: 1.02; max-width: none; letter-spacing: -0.01em; }
[data-theme="paper"] .hero__inner { border-bottom: 1px solid var(--line-strong); padding-bottom: 44px; }
[data-theme="paper"] .hero__sub { max-width: none; display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; margin-top: 40px; align-items: end; }
[data-theme="paper"] .hero__sub .lead { font-family: var(--font-display); font-size: clamp(1.2rem, 2.2vw, 1.6rem); color: var(--ink); }
[data-theme="paper"] .hero__meta { margin-top: 36px; border-top: 1px solid var(--line); padding-top: 18px; font-family: var(--font-mono); font-size: 12px; }

/* ---------- 8. 跑马灯 band ---------- */
.band { border-block: 1px solid var(--line); overflow: hidden; padding: 22px 0; }
[data-theme="ink"] .band { background: var(--bg-2); }
.marquee { display: flex; width: max-content; animation: marquee 32s linear infinite; }
.marquee:hover { animation-play-state: paused; }
.marquee__group { display: flex; align-items: center; gap: 0; }
.marquee__item {
  display: inline-flex; align-items: center; gap: 34px;
  font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 600; color: var(--ink-3);
  padding-right: 34px; white-space: nowrap;
}
.marquee__item .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); flex: none; }
.marquee__item em { font-style: normal; color: var(--ink); }
[data-theme="paper"] .marquee__item { font-family: var(--font-display); font-weight: 500; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 9. 分区头 ---------- */
.sec-head { margin-bottom: clamp(40px, 6vw, 72px); }
.sec-head h2 { font-size: clamp(1.9rem, 4.4vw, 3.2rem); margin-top: 16px; max-width: 20ch; }
.sec-head p { margin-top: 16px; max-width: 58ch; color: var(--ink-2); }
[data-theme="paper"] .sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line-strong); padding-top: 16px; flex-wrap: wrap; }
[data-theme="paper"] .sec-head h2 { font-weight: 500; }
[data-theme="paper"] .sec-head .eyebrow::before { display: none; }

/* ---------- 10. 产品区（三主题三布局） ---------- */
/* studio: 三列卡片 */
[data-theme="studio"] .products__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
[data-theme="studio"] .product-card {
  background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius);
  padding: 34px 30px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 18px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s;
}
[data-theme="studio"] .product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }

/* ink: bento */
[data-theme="ink"] .products__grid { display: grid; grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(150px, auto); gap: 18px; }
[data-theme="ink"] .product-card {
  grid-column: span 2; background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius);
  padding: 32px; backdrop-filter: var(--glass); position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 16px;
  transition: transform .35s ease, border-color .35s, box-shadow .35s;
}
[data-theme="ink"] .product-card--feature { grid-column: span 4; grid-row: span 2; }
[data-theme="ink"] .product-card--wide { grid-column: span 3; }
[data-theme="ink"] .product-card::after {
  content: ""; position: absolute; inset: 0; background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%), rgba(139,155,255,.14), transparent 45%);
  opacity: 0; transition: opacity .4s; pointer-events: none;
}
[data-theme="ink"] .product-card:hover::after { opacity: 1; }
[data-theme="ink"] .product-card:hover { transform: translateY(-4px); border-color: rgba(139,155,255,.4); box-shadow: var(--shadow); }

/* paper: 编号行 */
[data-theme="paper"] .products__grid { display: block; border-top: 1px solid var(--line-strong); }
[data-theme="paper"] .product-card {
  display: grid; grid-template-columns: 64px 1fr auto; align-items: center; gap: 28px;
  padding: 36px 0; border-bottom: 1px solid var(--line);
  transition: padding .3s ease, background .3s;
}
[data-theme="paper"] .product-card:hover { padding-left: 20px; background: var(--bg-2); }

.product-card__no { font-family: var(--font-mono); font-size: 13px; color: var(--ink-3); letter-spacing: .1em; }
.product-card__icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: var(--accent); color: var(--accent-ink); flex: none; }
[data-theme="paper"] .product-card__icon { border-radius: 0; background: transparent; color: var(--accent); width: auto; height: auto; }
.product-card h3 { font-size: 1.45rem; margin-top: 2px; }
.product-card p { color: var(--ink-2); font-size: 15px; }
.product-card .product-card__name { display: flex; flex-direction: column; gap: 6px; }
[data-theme="paper"] .product-card .product-card__name h3 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
.product-card__tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--ink-3); text-transform: uppercase; }
.product-card__link { margin-top: auto; font-weight: 600; font-size: 14.5px; display: inline-flex; align-items: center; gap: 8px; color: var(--ink); }
.product-card__link .arr { color: var(--accent); transition: transform .3s; }
.product-card:hover .product-card__link .arr { transform: translateX(5px); }
[data-theme="paper"] .product-card__link { font-family: var(--font-mono); font-size: 13px; }

/* ---------- 11. 特性列表 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { padding: 28px; border: 1px solid var(--card-line); border-radius: var(--radius); background: var(--card); transition: transform .3s, border-color .3s; }
.feature:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.feature h4 { font-size: 1.05rem; margin: 16px 0 8px; }
.feature p { font-size: 14.5px; color: var(--ink-2); }
.feature__mark { width: 34px; height: 34px; display: grid; place-items: center; color: var(--accent); }
[data-theme="ink"] .feature { background: var(--card); backdrop-filter: var(--glass); }
[data-theme="paper"] .feature { border-radius: 0; background: transparent; padding: 28px 0 0; border: 0; border-top: 1px solid var(--line); }
[data-theme="paper"] .feature:hover { transform: none; border-color: var(--line); }

/* ---------- 12. 数字统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { padding: 34px 28px; border-radius: var(--radius); background: var(--bg-2); border: 1px solid var(--line); text-align: center; }
.stat__num { font-size: clamp(2.2rem, 4.5vw, 3.4rem); font-weight: 700; letter-spacing: -0.03em; font-family: var(--font-display); }
.stat__num .unit { font-size: .5em; color: var(--accent); margin-left: 4px; }
.stat__label { margin-top: 8px; font-size: 13.5px; color: var(--ink-3); }
[data-theme="ink"] .stat { background: var(--card); backdrop-filter: var(--glass); }
[data-theme="ink"] .stat__num { color: var(--accent-2); }
[data-theme="paper"] .stat { border-radius: 0; background: transparent; border: 0; border-top: 1px solid var(--line-strong); text-align: left; }
[data-theme="paper"] .stat__num { font-weight: 500; }

/* ---------- 13. CTA ---------- */
.cta { position: relative; overflow: hidden; text-align: center; }
.cta__card {
  border-radius: var(--radius-lg); padding: clamp(56px, 8vw, 100px) clamp(24px, 5vw, 80px);
  background: var(--ink); color: var(--bg); position: relative; overflow: hidden;
  display: flex; flex-direction: column; align-items: center; gap: 22px;
}
.cta__card h2 { font-size: clamp(2rem, 5vw, 3.6rem); color: inherit; }
.cta__card p { color: rgba(255,255,255,.72); max-width: 52ch; }
.cta__card .btn--primary { background: var(--accent); color: var(--accent-ink); }
.cta__card::before {
  content: ""; position: absolute; width: 640px; height: 640px; border-radius: 50%;
  top: -60%; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(139,155,255,.35), transparent 60%); pointer-events: none;
}
[data-theme="ink"] .cta__card { background: linear-gradient(160deg, #0d0f1a, #151a33); border: 1px solid var(--card-line); color: var(--ink); }
[data-theme="ink"] .cta__card p { color: var(--ink-2); }
[data-theme="paper"] .cta__card { border-radius: 0; background: var(--ink); color: var(--bg); }
[data-theme="paper"] .cta__card::before { background: radial-gradient(circle, rgba(196,62,42,.3), transparent 60%); }

/* ---------- 14. 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 64px 0 40px; margin-top: 40px; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.footer__brand { display: flex; flex-direction: column; gap: 16px; }
.footer__brand p { color: var(--ink-3); font-size: 14px; max-width: 34ch; }
.footer h4 { font-size: 13px; font-family: var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 18px; font-weight: 600; }
.footer ul { display: flex; flex-direction: column; gap: 11px; }
.footer ul a { color: var(--ink-2); font-size: 14.5px; transition: color .25s; }
.footer ul a:hover { color: var(--ink); }
.footer__bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--ink-3); }
.footer__bottom .mono { font-family: var(--font-mono); letter-spacing: .06em; }
[data-theme="paper"] .footer__grid { grid-template-columns: 2fr 1fr 1fr; }

/* ---------- 15. 主题切换器（浮动） ---------- */
.theme-switcher {
  position: fixed; right: 20px; bottom: 20px; z-index: 200;
  display: flex; align-items: center; gap: 4px; padding: 6px;
  border-radius: 999px; background: var(--bg); border: 1px solid var(--line-strong);
  box-shadow: var(--shadow); backdrop-filter: var(--glass, blur(14px));
}
[data-theme="ink"] .theme-switcher { background: rgba(14,16,25,.7); }
.theme-switcher__label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-3); padding: 0 10px 0 14px; user-select: none;
}
.theme-switcher button {
  padding: 8px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--ink-2);
  transition: background .3s, color .3s, box-shadow .3s; white-space: nowrap;
}
.theme-switcher button:hover { color: var(--ink); }
.theme-switcher button.active { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow-sm); }
[data-theme="paper"] .theme-switcher, [data-theme="paper"] .theme-switcher button { border-radius: 0; }
[data-theme="paper"] .theme-switcher { border: 1px solid var(--line-strong); }

/* ---------- 16. 微交互 ---------- */
/* 光标辉光（仅墨夜 + 精细指针） */
.cursor-glow { position: fixed; width: 480px; height: 480px; border-radius: 50%; pointer-events: none; z-index: 0;
  background: radial-gradient(circle, rgba(139,155,255,.10), transparent 60%); transform: translate(-50%,-50%); opacity: 0; transition: opacity .4s; mix-blend-mode: screen; }
[data-theme="ink"] .cursor-glow.active { opacity: 1; }

/* 滚动揭示 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s cubic-bezier(.2,.65,.3,1), transform .7s cubic-bezier(.2,.65,.3,1); }
.reveal[data-reveal="left"] { transform: translateX(-40px); }
.reveal[data-reveal="right"] { transform: translateX(40px); }
.reveal[data-reveal="zoom"] { transform: scale(.92); }
.reveal.is-in { opacity: 1; transform: none; }

/* 磁性按钮 */
.magnetic { transition: transform .18s ease-out; }

/* 3D 倾斜卡 */
.tilt { transform-style: preserve-3d; transition: transform .2s ease-out; will-change: transform; }

/* 打字光标 */
.type-caret { display: inline-block; width: 2px; height: 1em; background: var(--accent); vertical-align: -0.12em; margin-left: 2px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* 底纹（studio 网格 / paper 无 / ink 颗粒） */
.bg-decor { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
[data-theme="studio"] .bg-decor {
  background-image: radial-gradient(circle at 1px 1px, rgba(10,11,16,.06) 1px, transparent 0);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.6), transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.6), transparent 70%);
}
[data-theme="ink"] .bg-decor { background-image: var(--grain); }

/* ---------- 17. 产品 Mockup ---------- */
.mock { position: relative; }
.mock__frame { border-radius: var(--radius-lg); border: 1px solid var(--card-line); background: var(--bg-2); box-shadow: var(--shadow-lg); overflow: hidden; }
[data-theme="ink"] .mock__frame { background: #0a0c13; box-shadow: var(--shadow-lg), var(--glow); }
[data-theme="paper"] .mock__frame { box-shadow: none; border: 1px solid var(--line-strong); }

/* 浏览器窗 */
.mock__bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--card-line); }
.mock__bar .d { width: 11px; height: 11px; border-radius: 50%; }
.mock__bar .d:nth-child(1) { background: #ff5f57; } .mock__bar .d:nth-child(2) { background: #febc2e; } .mock__bar .d:nth-child(3) { background: #28c840; }
.mock__bar .url { margin-left: 10px; font-size: 12px; color: var(--ink-3); background: var(--bg-3); padding: 4px 14px; border-radius: 8px; flex: 1; max-width: 260px; }

/* 键盘 mockup */
.kb { padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.kb__row { display: flex; gap: 8px; }
.kb__key {
  height: 46px; flex: 1; border-radius: 10px; background: var(--bg); border: 1px solid var(--card-line);
  display: grid; place-items: center; font-size: 13px; color: var(--ink-2); transition: background .15s, transform .15s, box-shadow .15s;
}
.kb__key--wide { flex: 2.2; }
.kb__key--space { flex: 5; }
.kb__key--accent { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.kb__key.lit { background: var(--accent); color: var(--accent-ink); transform: translateY(-2px); box-shadow: var(--glow, 0 6px 18px rgba(139,155,255,.35)); border-color: transparent; }
[data-theme="ink"] .kb__key { background: rgba(255,255,255,.04); }
[data-theme="paper"] .kb__key { border-radius: 0; }

/* Agent 窗口 */
.agent { display: flex; flex-direction: column; min-height: 320px; }
.agent__body { flex: 1; padding: 22px; display: flex; flex-direction: column; gap: 12px; font-size: 14px; }
.agent__task { font-family: var(--font-mono); font-size: 12px; color: var(--accent); letter-spacing: .04em; }
.agent__step { display: flex; gap: 10px; align-items: flex-start; color: var(--ink-2); }
.agent__step .tick { color: var(--accent); flex: none; font-family: var(--font-mono); }
.agent__bar { border-top: 1px solid var(--card-line); padding: 12px 16px; display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--ink-3); }
.agent__bar input { flex: 1; background: var(--bg-3); border: 0; padding: 10px 14px; border-radius: 10px; color: var(--ink); font: inherit; }
.agent__bar input::placeholder { color: var(--ink-3); }

/* 卡片网格小样 */
.mini-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 22px; }
.mini-cell { border-radius: 12px; background: var(--bg); border: 1px solid var(--card-line); height: 84px; }
.mini-cell.fill { background: var(--accent); border-color: transparent; }

/* ---------- 18. 愿景长卷 ---------- */
.vision-line { font-size: clamp(1.6rem, 3.6vw, 3rem); line-height: 1.4; font-family: var(--font-display); font-weight: 600; max-width: 24ch; }
.vision-line .dim { color: var(--ink-3); }
[data-theme="paper"] .vision-line { font-weight: 500; }
.vision-block { display: grid; grid-template-columns: 200px 1fr; gap: 32px; align-items: start; }
.vision-block__no { font-family: var(--font-mono); font-size: 13px; color: var(--accent); letter-spacing: .1em; padding-top: 8px; }
.vision-block p { font-size: clamp(1.1rem, 1.8vw, 1.4rem); color: var(--ink-2); max-width: 62ch; }
.vision-block p strong { color: var(--ink); font-weight: 600; }

/* ---------- 19. 响应式 ---------- */
@media (max-width: 960px) {
  .nav__links { display: none; }
  [data-theme="studio"] .products__grid, .feature-grid { grid-template-columns: 1fr; }
  [data-theme="ink"] .products__grid { grid-template-columns: 1fr 1fr; }
  [data-theme="ink"] .product-card--feature, [data-theme="ink"] .product-card--wide { grid-column: span 2; grid-row: auto; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  [data-theme="paper"] .hero__sub { grid-template-columns: 1fr; }
  [data-theme="paper"] .product-card { grid-template-columns: 44px 1fr; }
  [data-theme="paper"] .product-card__link { display: none; }
  .vision-block { grid-template-columns: 1fr; gap: 12px; }
  .theme-switcher__label { display: none; }
}
@media (max-width: 560px) {
  [data-theme="ink"] .products__grid { grid-template-columns: 1fr; }
  [data-theme="ink"] .product-card--feature, [data-theme="ink"] .product-card--wide { grid-column: span 1; }
  .stats { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .theme-switcher { right: 50%; transform: translateX(50%); }
  .theme-switcher button { padding: 8px 11px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
  .marquee { animation: none; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 20. 界面艺术馆 ---------- */
.gallery__head { margin-bottom: clamp(40px, 6vw, 72px); max-width: 760px; }
.gallery__head h2 { font-size: clamp(1.9rem, 4.4vw, 3.2rem); margin-top: 16px; }
.gallery__head p { margin-top: 16px; color: var(--ink-2); }
.gallery__creed { margin-top: 26px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; color: var(--accent); line-height: 1.9; }

/* studio: 两列 */
[data-theme="studio"] .gallery__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
[data-theme="studio"] .piece { border: 1px solid var(--card-line); border-radius: var(--radius-lg); overflow: hidden; background: var(--card); box-shadow: var(--shadow-sm); transition: transform .3s ease, box-shadow .3s ease; }
[data-theme="studio"] .piece:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

/* ink: bento 错落 */
[data-theme="ink"] .gallery__grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
[data-theme="ink"] .piece { grid-column: span 3; border: 1px solid var(--card-line); border-radius: var(--radius-lg); overflow: hidden; background: var(--card); backdrop-filter: var(--glass); }
[data-theme="ink"] .piece--hero { grid-column: span 6; }
[data-theme="ink"] .piece--wide { grid-column: span 4; }

/* paper: 展签竖排 */
[data-theme="paper"] .gallery__grid { display: block; border-top: 1px solid var(--line-strong); }
[data-theme="paper"] .piece { display: grid; grid-template-columns: 1.1fr 1fr; gap: 36px; padding: 40px 0; border-bottom: 1px solid var(--line); transition: background .3s; }
[data-theme="paper"] .piece:hover { background: var(--bg-2); }

.piece__mock { background: var(--bg-2); border-bottom: 1px solid var(--card-line); padding: 20px 18px; display: grid; place-items: center; overflow: hidden; }
[data-theme="paper"] .piece__mock { border-bottom: 0; border: 1px solid var(--line-strong); background: var(--bg); }
.piece__caption { padding: 22px 24px 24px; display: flex; flex-direction: column; gap: 8px; }
[data-theme="paper"] .piece__caption { padding: 0; justify-content: center; }
.piece__no { font-family: var(--font-mono); font-size: 12px; color: var(--accent); letter-spacing: .14em; }
.piece h3 { font-size: 1.25rem; }
[data-theme="paper"] .piece h3 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); font-weight: 500; }
.piece__logic { font-size: 14.5px; color: var(--ink-2); }
.piece__logic::before { content: "「"; } .piece__logic::after { content: "」"; }
[data-theme="paper"] .piece__logic { font-family: var(--font-display); font-size: 1.1rem; color: var(--ink); }
.piece__why { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; }
[data-theme="paper"] .piece__why { color: var(--ink-2); }

/* 画廊内 mock 元件 */
.candbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.cand { padding: 8px 14px; border-radius: 10px; background: var(--bg); border: 1px solid var(--card-line); font-size: 13px; color: var(--ink-2); }
.cand--main { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.cand--ghost { background: transparent; border-style: dashed; color: var(--ink-3); }
.wave { display: flex; align-items: center; gap: 3px; height: 44px; }
.wave i { width: 3px; height: 8px; background: var(--accent); border-radius: 2px; animation: wave 1.1s ease-in-out infinite; }
.wave i:nth-child(2n) { animation-delay: .15s; } .wave i:nth-child(3n) { animation-delay: .3s; }
@keyframes wave { 0%, 100% { height: 8px; } 50% { height: 36px; } }
.numpad { display: grid; grid-template-columns: repeat(3, 44px); gap: 8px; }
.numpad span { height: 44px; border-radius: 10px; background: var(--bg); border: 1px solid var(--card-line); display: grid; place-items: center; font-size: 14px; color: var(--ink-2); }
.numpad span.on { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.auth { display: flex; gap: 10px; }
.auth span { padding: 10px 16px; border-radius: 999px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; border: 1px solid var(--line-strong); color: var(--ink-2); }
.auth span.deny { border-color: var(--accent); color: var(--accent); }
[data-theme="paper"] .numpad span, [data-theme="paper"] .cand, [data-theme="paper"] .auth span { border-radius: 0; }

/* 画廊响应式 */
@media (max-width: 900px) {
  [data-theme="studio"] .gallery__grid, [data-theme="paper"] .piece { grid-template-columns: 1fr; }
  [data-theme="ink"] .gallery__grid { grid-template-columns: 1fr 1fr; }
  [data-theme="ink"] .piece, [data-theme="ink"] .piece--hero, [data-theme="ink"] .piece--wide { grid-column: span 2; }
}
@media (max-width: 560px) {
  [data-theme="ink"] .gallery__grid { grid-template-columns: 1fr; }
  [data-theme="ink"] .piece, [data-theme="ink"] .piece--hero, [data-theme="ink"] .piece--wide { grid-column: span 1; }
}